Sen. Michael Bennet (D-CO) is seriously considering running for president in 2020, according to individuals familiar with the lawmakers thinking.

According to a report released Monday via Colorado Public Radio, three individuals confirm Bennet has discussed a possible White House run. One of the people said they breached the subject with the Colorado Democrats in the last month.

“What he said to me is he is seriously thinking about running,” one source told the outlet. “He has not made up his mind yet but he is seriously thinking about running.” Buzz about Bennet follows a November Associated Press report revealing he has been in touch with top Democrats in Iowa. When asked about the report, Bennet replied: “I don’t have anything to say about that today.”

Bennet isn’t the only high-profile Colorado lawmakers mulling a presidential run. Democrat Gov. John Hickenlooper is reportedly weighing a run for the highest office in the land, while political observers have floated the Democrat as a possible running mate for another potential 2020 candidate — Republican Ohio Gov. and staunch Trump critic John Kasich. Hickenlooper has already launched a super PAC and met with supporters in primary battleground states such as New Hampshire and Iowa.

Bennet is among an ever-growing group of Democrats toying with a White House bid, which includes former Vice President Joe Biden and Sens. Kamala Harris (D-CA), Bernie Sanders (I-VT), and Elizabeth Warren, (D-MA).

Twice-failed presidential candidate Hillary Clinton and Rep. Robert Francis “Beto” O’Rourke (D-TX) have also yet to rule out a possible run.